BUY S9015 M6 https://www.utsource.net/itm/p/9509637.html

Package Type: SOT-23-CJ Description: NPN Transistor Features: Low collector-emitter saturation voltage High current gain High breakdown voltage High reliability Low noise Low collector-emitter leakage current Low collector-base leakage current High frequency High gain bandwidth Low collector-emitter capacitance Applications: Audio amplifiers Low noise amplifiers High frequency amplifiers Switching circuits Pulse circuits DC-DC converters Motor control circuits Relay drivers Solenoid drivers LED drivers High speed switching circuits High speed logic circuits (For reference only)